We’ve all been stuck behind one before. A car that clearly hasn’t passed a smog check in years, spewing smoke from its tailpipe like there’s no tomorrow. You probably know that the stuff coming out of there isn’t good for you, or the environment. But what exactly is it composed of?

It’s comforting for parents to know that all the most frightful aspects of Halloween — even candy corn — will be an afterthought come Nov. 1. All the candy will either be devoured, hidden away for rationing, or shipped off to the troops. Read more →